Which of these never changes during a chemical change?
a. the arranhement of the atoms
b. the total number of molecules
c. the total number of atoms
d. the color of the reactants

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

Which of the following graphs have the same wavelengths

Physical characteristics of down syndrome